All categories

3 years ago

The reduction of iron(III) oxide (Fe203) to pure iron during the first step of steelmaking,

Chemistry

1 answer:

Anna71 [15]3 years ago

5 0

Answer:

The minimum mass of coke needed to produce 850 t is equal to 172223.4 kg

Explanation:

The balanced reaction for the formation of the is as follows:

2Fe + 3/2O2 = Fe2O3, ΔG = -830 kJ/mol

Fe2O3 = 2Fe + 3/2O2, ΔG = +830 kJ/mol

2Fe2O3 = 4Fe + 3O2, ΔG = (+830*2) = +1660 kJ/mol

the mass of iron = 850 ton = 850000 kg

the necessary energy will be equal to:

Energy = (1660*850000)/(4*56x10^-3) = 6.299x10^9 kJ

the energy released by 1 mole of CO2 is equal to 439 kJ/mol

mol of CO2 = 6.299x10^9/439 = 1.434x10^7 mol

now we will calculate the kilograms of coke that are required:

mass of coke = 1.434x10^7 mol * (12.01 g/mol) * (1 kg/1000 g) = 172223.4 kg

You might be interested in

The mass of .10 moles of iron is:

Stels [109]

Answer:

so mass in gram=560grams

Explanation:

number of moles=10moles

molar mass=56grams/moles

mass in gram of Fe=?

as we know that

$number of moles=\frac{mass in gram}{molar mass}$

evaluating the formula

number of moles×molar mass=mass in gram

mass in gram=10moles×56grams/moles

mass in gram=560grams

i hope this will help you :)

8 0

3 years ago

Read 2 more answers

Copper is an example of a(n) __________.

navik [9.2K]

The answer is D. element

It's not a mixture, just a pure element. Copper (Cu) is found on the Periodic Table of the Elements, where only ELEMENTS are organized.

7 0

3 years ago

Read 2 more answers

8. Select the lattice energy for rubidium chloride from the following data (in kJ/mol]

yKpoI14uk [10]

Answer:

Option C

Explanation:

The chemical reactions which are involved while solving this problem is there in the file attached and each chemical reaction is represented by a certain equation number

Lattice energy for rubidium chloride ( RbCl) is represented by the equation 6

Equation 1 represents the change in enthalpy for formation of RbCl

Equation 2 represents the sublimation reaction of rubidium

Equation 3 represents the ionization enthalpy of rubidium

Equation 4 represents the enthalpy of atomization of chlorine which means it describes the bond enthalpy of Cl2 molecule

Equation 5 represents the electron affinity of chlorine

To find the lattice energy for RbCl we have to use all the equations from 1 to 5 so that at last we get the equation 6

We have to perform operations such as

Equation 1 - equation 2 - equation 3 - equation 4 - equation 5

By performing these operations the intermediate compounds gets cancelled and at last we get equation 6

So Equation 1 ≡ ΔH $_{f}$ = -431 kJ/mol

Equation 2 ≡ Rb(s) ---> Rb(g) = 85.8 kJ/mol

Equation 3 ≡ IE1(Rb) = 397.5 kJ/mol

Equation 4 ≡ BE(Cl2) = 226 kJ/mol

Equation 5 ≡ Electron Affinity Cl = -332 kJ/mol

Value corresponding to the equation 6 will be the value of lattice energy of RbCl and the value is -695·3 kJ/mol

∴ Lattice energy for rubidium chloride is approximately -695 kJ/mol

4 0

3 years ago

Name 3 sources of co2

Veronika [31]

Answer: There are both natural and human sources of carbon dioxide emissions. Natural sources include decomposition, ocean release and respiration. Human sources come from activities like cement production, deforestation as well as the burning of fossil fuels like coal, oil and natural gas.

Explanation:

4 0

3 years ago

Which laws can be combined to form the ideal gas law

White raven [17]

1-boyle's law (pressure and volume)
2- Charles' law (volume and temperature)
3- Avogadro's law ( number of mole and volume)
4- Gay-Lussac's law ( pressure and temperature)

3 0

3 years ago

Read 2 more answers